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Julian year A Julian year can refer to: * The Julian year (astronomy) is a time interval of exactly 365.25 Earth days, used in astronomy. * The Julian year (calendar) is a year in the Julian calendar which has started on different days, at different times, in different countries and is equal to either 365 or 366 days, or 365.25 days on average.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Julian year」の詳細全文を読む
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